How Do Galaxies Stop Making Stars?

Daniel: How do galaxies stop having any babies? I sayi i think i see what's going on here. Daniel: You associate a not working with dying. That's why i'm never going to an cler. Like if o retire die, like if a professor stops making papers,. Who even are you? Anha, ha ha, but you a jes to be clear, that' can what we're saying right? The galaxies that don't maybe, i guess they will at some point, grow dark.